I don't think the beach at Victoria House is quite as good as Mar de Tumbo a little bit north, but the Victoria House beach is very nice and the beach and grounds are beautiful (and the new pool is gorgeous).

If you have your heart set on fabulous Anguilla-style beaches and great swimming off the shore, you're going to be disappointed in all of the beaches on Ambergris. The reef just offshore stops the wave action which over long periods creates the kind of wide sandy beaches (and dead zone seafloor) that you find in parts of the Yucatan. VH removes the seagrass to create a swimming area.

You'll definitely spend most of the time sunning and swimming in the awesome pool...but as it has been said...I didn't see any great beaches in AC. Poke around victoria-house.com and you'll be able to see just what you'll get as far as beach and grounds.